Graphics Reference
In-Depth Information
Sector, Industry, Sub-Industry, Company, Holdings
Technology, Software, Application Software, Adobe,
12857
Technology, Hardware, Computer Hardware, Apple, 10475
Financials, Insurance, Life Insurance, Aflac, 2934
...
Hierarchy Codes (for Example, Government Data)
Sometimes hierarchies are defined with alphanumeric codes. The various
nodes and links can be extracted via a lookup table indicating the code.
For example, the previous data showing a financial portfolio and hierarchy
can be described using standardized codes such as Global Industry
Classifications (GICs), wherein the data may resemble the following:
Company, GICScode, Holdings
Adobe, 4510, 12857
Apple, 4520, 10475
Aflac, 4030, 2934
...
In this example, the numeric code can be decoded to determine the position
of each item in the hierarchy. For example, in the GICs system, the first two
numbers determine the sector, the next digit determines the industry, and
the fourth digit determines the subindustry.
Alphanumeric hierarchies are common in some government data. For
example, see the
Occupations
(and corresponding yEd visualization file)
data set in the Supplementary Materials on this topic's companion website
for a hierarchical data set showing salary data by occupation in the United
States.
Hierarchy as Indentations (for Example, Reports)
In some software and reports, hierarchies are made human-readable by
using whitespace (for example,
www.bls.gov/cpi/#data
)
. Extracting the
number of spaces in front of a label determines that node's level in the
hierarchy, and the next shortest line immediately above determines the
parent (that is, link) for that node:
